<template>
    <div class="shopcar-container">

        <div class="goods-list">
            <!-- 商品列表区域 -->
            <div class="mui-card" v-for='(item,index) in goodslist' :key="item.id">
                <div class="mui-card-content">
                    <div class="mui-card-content-inner">
                        <mt-switch v-model="$store.getters.getGoodsSelected[item.id]" @change="selectedChanged(item.id,$store.getters.getGoodsSelected[item.id])"></mt-switch>
                        <img :src="item.img">
                        <div class="info">
                            <h1>{{item.title}}</h1>
                            <p>
                                <span class="price">￥{{item.sell_price}}</span>
                                <numbox :initcount="$store.getters.getGoodsCount[item.id]" :goodsid="item.id"></numbox>
                                <!-- 问题：如何从购物车中获取商品的数量
                                1.我们可以先创建一个空对象，然后循环购物车中所有商品的数据，把 当前循环这条商品的id，作为对象的属性名
                                count值作为对象的属性值，这样，当把所有的商品循环一遍，就会得到一个对象{1:1,2:1,3:1} -->
                                <a href="#" @click.prevent="remove(item.id,index)">删除</a>
                            </p>
                        </div>
                    </div>
                </div>
            </div>

        </div>

        <!--结算区域  -->
        <div class="mui-card">
            <div class="mui-card-content">
                <div class="mui-card-content-inner jiesuan">
                    <div class="left">
                        <p>总计(不含运费)</p>
                        <p>已勾选商品<span class="red">{{$store.getters.getGoodsCountAndAmount.count}}</span> 件，总价
                        <span class='red'>￥{{$store.getters.getGoodsCountAndAmount.amount}}</span></p>
                    </div>
                    <mt-button type='danger'>去结算</mt-button>
                </div>
            </div>
        </div>
    </div>
</template>

<script>
import numbox from '../subcomponents/shopcar_numbox.vue'
export default {
    data(){
        return {
            goodslist:[]//购物车中所有商品的数据
        }
    },
    created(){
        this.getGoodsList();
    },

    methods:{
        getGoodsList(){
            //获取到store中所有的商品id，然后拼接出一个用逗号隔开的字符串
            var idArr=[];
            this.$store.state.car.forEach(item=>idArr.push(item.id));
            //如果，购物车中没有商品，则直接返回，不需要再请求数据接口，否则会报错
            if(idArr.length<=0){
                return ;
            }
            //获取购物车商品列表
            this.$http.get("getShopCarList/"+idArr.join(",")+'.json').then(result=>{
                if(result.body.status===0){
                    this.goodslist=result.body.message;
                }
            })

        },
        remove(id,index){
            //点击删除，把商品从store中根据传递的id删除，同时，把当前组件的goodslist中，对应要删除的那个商品，使用index来删除
            this.goodslist.splice(index,1);
            this.$store.commit("removeFormCar",id);
        },
        selectedChanged(id,val){
            //每当点击开关，再把最新的开关状态，同步到store中
            this.$store.commit('updateGoodsSelected',{id,selected:val})
        }

    },
    components:{
        numbox
    }
}
</script>

<style lang="scss" scoped>
.shopcar-container{
    background:#eee;
    overflow: hidden;
    .goods-list{
        .mui-card-content-inner{
            display: flex;
            align-items: center;
        }
        img{
            width: 60px;
            height: 60px;
        }
        h1{
            font-size: 13px;

        }
        .info{
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            .price{
                color: red;
                font-weight: bold;
            }
        }
    }
    .jiesuan{
        display: flex;
        justify-content: space-between;
        align-items: center;
        .red{
            color: red;
            font-weight: bold;
            font-size: 16px;
        }
    }
}
</style>
